Increate try_sleep to 10 for Galera wait-initial-sync

Deployment can fail under high load due to slow MySQL start.

Change-Id: I491f4eed6c12b960f34f1b0ce45d72c62f48ab60
Closes-Bug: 1522350

deployment/puppet/galera/manifests/init.pp

@@ -288,7 +288,7 @@ class galera (
   $user_password_string="-u${mysql_user} -p${mysql_password}"
   exec { 'wait-initial-sync':
     command     => "/usr/bin/mysql ${user_password_string} -Nbe \"show status like 'wsrep_local_state_comment'\" | /bin/grep -q -e Synced -e Initialized && sleep 10",
-    try_sleep   => 5,
+    try_sleep   => 10,
     tries       => 60,
     refreshonly => true,
   }